#!/bin/bash

# Slackware build script for trs80gp

# Written by B. Watson (urchlay@slackware.uk)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# Note: I found no way to use this emulator without PulseAudio. This
# is only a problem for holdouts like me, who hate pulse and
# actively avoid using it. apulse won't work (it doesn't supply
# libpulsecommon-*.so), and the emulator will segfault at startup if
# it can't use pulse. The only workaround is to run "trs80gp -sx", but
# that disables *all* audio, which is not really ideal. Closed source,
# so no patching.

# Dirt hack alert!
#
# The 32-bit x86 binary actually runs fine on Slackware 14.2. But on 15.0,
# it crahes on startup:
#
# trs80gp: cairo-surface.c:1817: cairo_surface_set_device_scale: Assertion `status == CAIRO_STATUS_SUCCESS' failed.
#
# To make it run on 15.0, use the cairo shared libs from 14.2. Amazingly,
# this actually works!
#
# So on i?86, /usr/games/trs80gp is a wrapper script that execs the
# real binary with the old cairo libs preloaded. On all other arches,
# /usr/games/trs80gp is the real binary.

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=trs80gp
VERSION=${VERSION:-2.4.11}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

case "$ARCH" in
     i?86) DIR=linux-32 ;;
   x86_64) DIR=linux-64 ;;
      arm) DIR=rpi-32   ;;
  aarch64) DIR=rpi-64   ;;
esac

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
mkdir -p $PRGNAM-$VERSION
cd $PRGNAM-$VERSION
unzip $CWD/$PRGNAM-$VERSION.zip
chown -R root:root .
# reset permissions, please do not revert to template.
find . -type f -a -exec chmod 644 {} + -o -type d -a -exec chmod 755 {} +

# Main binary, one dir per arch. No -s here, it's already stripped.
if [ "$DIR" = "linux-32" ]; then
  install -D -m0755 $DIR/$PRGNAM $PKG/usr/libexec/$PRGNAM/$PRGNAM
  install -D -m0755 -oroot -groot $CWD/wrapper32.sh $PKG/usr/games/$PRGNAM
  mkdir -p $PKG/usr/lib/$PRGNAM
  cd $PKG/usr/lib/$PRGNAM
  tar xvf $CWD/cairo-1.14.6-i586-2.txz \
          --wildcards \
          --strip-components=2 \
          usr/lib/libcairo\*.so\*
  cd -
else
  install -D -m0755 $DIR/$PRGNAM $PKG/usr/games/$PRGNAM
fi

# Rest of the goodies are in the Mac app bundle.
PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
SFX=$PKG/usr/share/$PRGNAM/sounds
DISKS=$PKG/usr/share/$PRGNAM/disks
RES=mac/trs80gp.app/Contents/Resources
mkdir -p $PKGDOC/html $SFX $DISKS

# The sounds are meant to be used with the -sf option, to have
# the emulator make mechanical disk noises during disk I/O.
# Since it's closed-source, I can't patch it to look in our dir for
# the wav files. They're disabled by default, anyway.
cp -a $RES/*.wav $SFX

# Note: doc.html is identical to help/all.html, don't bother.
# Nothing seems to need $RES/*.png, don't bother.
cp -a $RES/*.txt $PKGDOC
cp -a $RES/help/*.{html,png} $PKGDOC/html

# The emulator ships zipped disk images, but seems to require them
# to be unzipped to actually use them. Takes up 10MB, but gives a
# nice selection of DOSes and blank disks.
for i in $RES/*.zip; do
  unzip -LL $i -d $DISKS
done

# Stub man page by SlackBuild author. Just a pointer to the real docs.
mkdir -p $PKG/usr/man/man6
gzip -9c < $CWD/$PRGNAM.6 > $PKG/usr/man/man6/$PRGNAM.6.gz

# Icons converted with icns2png and resized with ImageMagick. Original
# source mac/trs80gp.app/Contents/Resources/AppIcon.icns in the tarball.
HICOLOR=$PKG/usr/share/icons/hicolor
for i in $CWD/icons/*.png; do
  px="$( basename $i .png )"
  sz="${px}x${px}"
  dir=$HICOLOR/$sz/apps
  mkdir -p $dir
  cat $i > $dir/$PRGNAM.png
done
mkdir -p $PKG/usr/share/pixmaps
ln -s ../icons/hicolor/48x48/apps/$PRGNAM.png $PKG/usr/share/pixmaps/$PRGNAM.png

# .desktop file written by SlackBuild author.
mkdir -p $PKG/usr/share/applications
cat $CWD/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE